Polarized relay.



R.. L. DEAN.

PDLABIZED RELAY.

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Patented May 18, 1909.

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POLARIZED RELAY. APPLIGATIDN rum rn.e,1eoa.

Patented May 18, 1909.

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Illbtmt faber? l. 176022 UNITED sTAfrnsMPATENT OFFICE.

ROBERT L. DEAN, 0F 'KANSAS UlTY, MISSOURI, ASSIGNOR TO DEAN RAPIDTELEGRA Pll C0.,

i A CORPORATION OF ARIZONA. TERRITORY.

POLARIZED RELAY.

specification or Letters Patent.

Patented May 18, 1909.

Application led February 6, 1908. Serial No. 414,462.

-of Missouri, have invented certain new and useful Improvements inPolarized Relays, of which the following is a specification.

My invention relates .to an improved po larizedrelay which may be einloyed for general purposes, but is particular y adapted or aprinting-telegraph circuit or similar s stein where impulses varying inlength and irection are transmitted over a line wire to a receiver.

In ordinary polarized-rela s employingbut one Ivibratory ton ue, theatter remains in the position to w ich it has been last attracted withthe objectionable result that it is impossible without specialprovision, to send two successive impulses in the same direction. Inothers' the vibrator tongue is held midway between the poles o theelectromagnet by sprin s, so that it may respond to successive impu sesllowing in the samedirection. One objection to this arrangement is thatone spring will soon become weaker than the other and permit thestronger to draw the tongue closer toone pole than the other. 4A furtherobjection is that the sprin s are comparatively slow to act, and retarthe vibratory movement of the ton ue to such extent as to materiallyreduce tiliec'apacit of the line wire, andalso prevent the reeor inginstrument of the rcceiver from printing clear, sharp characters? Iovercome these objections by employing two tongues, two sets ofcontact-stops, and

, means for restoring the tongues to normal after being actuated by theelectromagnet of the relay.

Referring now to the accompanying drawings illustrating the invention,Figure 1 represents a side elevation of a polarized-relay provided withmy improvements. Fig. 2 is a plan view of the same. Fig. 3 is a brokencross-section on line Ill-III of Fig. 2. Fig. 4 is a brokencross-section on line IVIV of F ig. 2. Fig. 5 is a broken detailsection` on line V-V of Fig. 2. Fig. 6 is a detail front elevation ofthe tongue-restoring magnets with the vibratory tongues in crosssection. Fig. 7V shows the relay arranged in n telcgraphic circuit.

1 designates an insulating buse upon which is mounted a permanent magnet2, provided at its lower end with an electromagnet 3, having adjustablepolar projections 4 and 5.

Gund 7 designate two vibratory tongues arranged one above the other, andindependently mounted at their rear ends upon an axis 8 secured to theupper pole of ma'net 2. Tongues 6 and 7 extend between poles 4 and 5,and their free ends normally engage the diagonally-opposed insulatedterminals a l1 of two sets of stops 9 and 10, respectively, carried b'two Varms A11, 11 secured to the upper en of a standard 1,2, resting uAvon base 1. Une of said arms is insulated rom the standard by fiber 1 3to prevent the current short-circuiting from one side of the stops tothe other. Tongue 6 is adjusted close to pole 4 so that it will benormally attracted Jro thereby into Contact with the insulated termina]of stops 9, while tongue 7 is ad usted close to pole 5 so that 'theattraction thereof will normally hold the tongue in contact with theinsulated terminal of stops 10, see Figs. 2, 4, and 7. The stops are adjustable in arms 11 so that the members of each set may he adjusted a artor toward each other and thus regulate t 1e length ol the tonguemovements.

14 15 designate two tougnci-estoring inagnets arranged at opposite sidesof the tongues, the former of which has n. polo 16 op iosite tongue G,while the latter has a )ole 17 opposite tongue 7 so that said poles willhave greater attraction for their respective tongues. `Magnets 14 15 areprovide-.l with Vthreaded stems 18, which extend loosely through twobrackets 19 und are engaged by nuts 20 whereby the magnets may be adjusted apart. 21 designates a pair of coil s rings interposed betweenthe brackets and t ie adjacent ends of the magnets, to push the lattertoward the tongues when nuts 20 are loosened. By thusadjustably-mounting the magnets 1415, the force with which theirmagnetic fields act upon the tongues may be r ulated as desired.

iln the iagrarn, F ig. 7, 1 have shown the relay arran ed in atelegraphic circuit consisting of a ine wire A connected at its ends tothe poles of magnet 3 and two batteries B and (l of opposite polarity.l) designates u. transmitter for controlling the electrical impulsestransmitted from said batteries.

E designates e. local cin-uit in which n. ro ceiver F is arranged. Suidcircuit consists ol' a battery G, a circuit wire ll connect-ed atbattery Iends to circuit wire H set to se'nd a positive impulse frombattery B through circuit wire A In its passage through magnet 3 it jill increase the mag-` netism of thc positivepole 3 and attract tongue Gagainst the uninsulated sto -of set 9, trlius completiiigarlocal'circuit't wire K, magnet 14, wire J, battery G, and tongue 6. Thalocal'circuitwill energize magnet 14 so thatthe latter will instantly return thetongp' to the insulated member of set 9 when t 4e transmitter interruptsthe ositive impulse. When a ne ative impulse is transmitted from batterythe ne ative pole 3b of ma net 3 will become more ighly magnetized t anthe opposite pole 3 and thus attract tongue? into contact with the liveside of stops 10, so that a local circuit will be completed through wireI, magnet 15, circuit wire H, battery G, and tongue 7 This circuit willenergize magnet 15 so that it will instantly return ton ue '7 to itsnormal position against the insu ated member of stops 10 when the neative impulse from C is interrupte Y Y Having thus describ d myinvention, what I claim is: r

1. In a relay; a pair of vibratory tongues arranged in superposedrelation, a pair of contact stops for each tongue arranged one on eachside of each tongue, one of the stops of each pair of stops beinginsulated, said insulated stops being diagonally opposed to each other,a magnet for ycontrolling the vibratory movements of the tongues, andmeans for restoring the tongues 'to normal.

2l. In a relay, a permanent magnet, having an electro-magnet at itsloweren polar projections carried `by said' electro-magnet, `a pair ofvibratory tongues arranged in superposed relation and carried by theupper endv of said permanent magnet, a standard hav I arranged one abovelthe other,

rough lby each arm, and

vhaving Apolar projections.' disposed on o ing a pair of spaced verticalarms insulated from each other, said tongues extending in the spacebetween Ysaid arms, `tact stops carried by each arm to engage said apair of contongues, the lower stop of one air and the upper stop of theopposite pair o stops being insulated, and means for restoring thetongues to normal.

3. Ina relay, a pair of vibratory tongues a permanent magnet to theupper end of which each of `said tongues is secured, an electro-magnethaving polar projections on opposite sides of the tongues two pairs ofstops arranged one pair on eac Yside of each tongpe, the lower stoplofone pair of stops and t e upper stop f t e other pair of stopsdiagonally opposite said lower stop being insulated, and means torestore the tongue to normal. 4. In a relay, a pair of vibratorytongues, a permanent magnet, a common axis on one end of said magnet onwhich each of said tongues is mounted, an electro-'magnet carried by theother end of said permanent magnet and having polar projections disposedon opposite sides .of said tongues, a pair of spaced insulated arms on'opposite sides of t e tongues, a pair of contact stops carried a magnetfor each tongue arranged on one side thereof.

5. In a relay, a permanent magnet, having a pair of vibratory tonguesarranged one above the other and supported from one end of said magnet,an electro-magnet carried by the other end of said permanent magnet andP0 site'sides of the tongues, apair of space insulated arms, arranged onopposite sides of the tongues, a-pair of contact stops carried 'i

